obscure scale
oleander scale (Aspidiotus nerii)
olive parlatoria scale
olive scale
orange brown scale
orange chionaspis
orange scale (Aonidiella aurantii)
orange scale (Lepidosaphes beckii)
orange snow scale
orchid parlatoria scale
orchid scale
oriental citrus scale
oriental red scale
oriental scale
oriental yellow scale
oystershell scale (Diaspidiotus ostreaeformis)
oystershell scale (Lepidosaphes ulmi)